Java Reference
In-Depth Information
In the example shown in Listing 7-5, we perform various array manipulations after attaching an
ArrayChangeListener
to an
ObservableIntegerArray
. We print out the parameters passed to the
onChange()
method
when an event is fired.
Listing 7-5.
ArrayChangeEventExample.java
import javafx.collections.FXCollections;
import javafx.collections.ObservableIntegerArray;
public class ArrayChangeEventExample {
public static void main(String[] args) {
final ObservableIntegerArray ints = FXCollections.observableIntegerArray(10, 20);
ints.addListener((array, sizeChanged, from, to) -> {
StringBuilder sb = new StringBuilder("\tObservable Array = ").append(array).append("\n")
.append("\t\tsizeChanged = ").append(sizeChanged).append("\n")
.append("\t\tfrom = ").append(from).append("\n")
.append("\t\tto = ").append(to).append("\n");
System.out.println(sb.toString());
});
ints.ensureCapacity(20);
System.out.println("Calling addAll(30, 40):");
ints.addAll(30, 40);
final int[] src = {50, 60, 70};
System.out.println("Calling addAll(src, 1, 2):");
ints.addAll(src, 1, 2);
System.out.println("Calling set(0, src, 0, 1):");
ints.set(0, src, 0, 1);
System.out.println("Calling setAll(src):");
ints.setAll(src);
ints.trimToSize();
final ObservableIntegerArray ints2 = FXCollections.observableIntegerArray();
ints2.resize(ints.size());
System.out.println("Calling copyTo(0, ints2, 0, ints.size()):");
ints.copyTo(0, ints2, 0, ints.size());
System.out.println("\tDestination = " + ints2);
}
}
When we run the program in Listing 7-5, the following output is printed to the console:
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